[Bug c++/88636] New: [9 Regression] ICE: Segmentation fault (in c_tree_chain_next)

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88636

            Bug ID: 88636
           Summary: [9 Regression] ICE: Segmentation fault (in
                    c_tree_chain_next)
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: x86_64-unknown-linux-gnu

g++-9.0.0-alpha20181223 snapshot (r267388) ICEs when compiling
gcc/testsuite/gcc.target/i386/pr57848.c w/ -fno-exceptions --param
ggc-min-heapsize=0 on an Ivy Bridge host:

% x86_64-unknown-linux-gnu-g++-9.0.0-alpha20181223 -fno-exceptions --param
ggc-min-heapsize=0 -c gcc/testsuite/gcc.target/i386/pr57848.c
gcc/testsuite/gcc.target/i386/pr57848.c:5:29: internal compiler error:
Segmentation fault
    5 | #pragma GCC target("sse4.2")
      |                             ^
0xf2acef crash_signal
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/toplev.c:326
0xa019f7 c_tree_chain_next
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/c-family/c-common.h:1187
0xa019f7 gt_ggc_mx_lang_tree_node(void*)
        ./gt-cp-tree.h:110
0xc7a2e5 ggc_mark_root_tab
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/ggc-common.c:77
0xc7a4ec ggc_mark_roots()
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/ggc-common.c:94
0xaabec6 ggc_collect()
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/ggc-page.c:2201
0x8e733d c_parse_final_cleanups()
       
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20181223/work/gcc-9-20181223/gcc/cp/decl2.c:4776